Typewriting machine



Feb. 5, l1929.

4 Sheets-Sheet 1 0. /lfv'zvbn v- .L./armaf7 BY hala/L L ATTORNEYS TYPEWRITING MACHINE Flled Nov 13, 1926 H. A. AVERY ET AL Feb. 5,` 1929..

H. A. AVERY ET AL TYPEWRITING MACHINEv Filed Nov. 13, 1926 4 Sheets-Sheet 2 N INVENToRs 514.41761 Pee/mazm EME 011 .M ATTORNEYS H. A. AVERY ET AL TYPEWRITING MACHINE F eb. 5, 1929.l

Filed Nov. 15. '192e 4 Sheets-Sheet INVENTORS 4I/er 9 0- Petermann v4 .L E 071 BY f ATTORNEYS Feb. 5; 1929. 1,700,829

H. A. AVERY ET AL TYPEWRITING MACHINE Filed Nov. 15, 19.26 4 Sheets-Sheet 4 INVENTORS l?.

EC L Har/77011 A Afr-yo ATTORN EYS Patented F eb. 5, 1929.

HENRY ALLEN AvEnY. oTTo PETERMANN, AND EnW1N;L.'HAnivioNoE enoroN, NEW Yonx, AssreNons, EY NESNE ASSIGNMENTS, To i. c Sivirfrn e coEoNA-TYEE- .VRTERS INC., OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

TYPEWRITING MACHINE.

Application filed. November 13, 1926T rSerial No. 148,258. i

This invention relates to improvements in typewriting machines, and more particularly to margin controlling means (including line- I locking and line-lock-releasing mechanism) ifor use iii connection with such machines.

The invention has for its principal objects to provide simple and eiicient margin stop and inargin-stop-releasing devices; to provide a simple and inexpensive margin-alarm and line-locking mechanism; to provide a line-locking means shiftable with a caseshift frame for the platen carriage and adapted to prevent the printing instrumentalities on the main frame of the machine from making impressions; to provide means :tor blocking printing action by blocking a type-'bar-actiiated universal .bar through the 'medium of a. relatively shiftable dog rocker for the carriage escapement in all case positions ot a shiftframe upon which the dog rocker is mounted; to provide line-locking means mounted on the shift frame of the ma-V chine and releasable from a key in the keyboard; to provide line-locking means adapted to simultaneously lock an escapement mechanism and a releasing mechanism for the es- Yc apement against actuation; to provide, inl

a machine having a dog rocker and a handoperated escapement releasing device for ovei'throwing the dog rocker to release the escapement, a line-locking means for locking the dog rocker and also locking said dogrockeroveithrowing device when the vcai'- riage reaches a predetermined letter-space position, and manually operable marginreleasing means for releasing said linelockiiig means; and to provide line-lockingy means and releasing means therefor whichconsists of few parts, is light and compact in construction, and which is adapted to *be vier.' of aportable three-quarter strike typewriting machine containing the improvements, the several parts being in normal position; f

to normalposition.A

The improvements have been illustrated in connection with a portable three-quarter Fig. 2 afragmentary. sectional view showing the part-s positioned as at the end of Fig. 3 a v 'ew similar toV Fig. 2 showing the line-locking means in'locking position and a type bar restrained from making lan impres-v sion; 1 l 'i Fig. 4 a detail perspective view showing the margin release key in the keyboard fully depressed Fig. 5 a rear view taken at an angle per-- Fig. 7 avdetail sectional view of the escapement mechanism and adiacent parts of the line-locking and margin-release means;

Fig. v8 a detail perspective view showing the stop ydevices for controlling travel of the carriage toward the right; 1

Fig. 9 a detail perspective view showing the Vdog-rocker and escapement-releasing.

means both locked against actuationfby the linelocking device; n Y Fig. l0 a fragmentary.perspective view of mal position; and f i Figs. ll and l2 sectional views on an enthe machine'. the several parts being in 'norlarge'd scale showing the manner in which the escapement releasing means blocks locking movement of the line-locking means whiie said releasing means is in releasing position and until the .dog rocker and the escapement' releasing bell-cranklever have both returned strike typewriting machinefconstruct'ed as disclosed in the applications of Avery, Petermann and Harmon, Serial ,N os. 148,255 and 148,257, both tiled November 13, 1926.

. Only so much of said machine as is neces-y sary to a full understanding of 'the present' invention has been shown and `will be described. l Y Y The main rameof tlie'machine comprises a front wall 10, a rear wall 11, side walls l2', and a transverse partition wall 18V lying in an upwardly and rearwardly inclined plane in the rear part of' the frame. The type bar `af printing stroke of a type bar;

4respectively.

segment 14.is held to the front face of wall 13 by suitable fastening screws with its arcuate type-barepivot wire 16 lying in a plane parallel with said wall. The type bars 17 are pivoted on wire 16't0 strike on the upper front quarter of the platen A'18. The character key levers 19 are pivoted at their rear ends on a transverse pivot wire 2O held to a fulcru'in plate 21 which is fastened by suitable screws against the rear face ofv wall 13. Key levers 19eXtend down behind wall 13 and then for ward under said wall to the keyboard at the forward part of the frame, and are guided in a comb 22 held to the main frame. The connection between each type bar and its associated key lever comprises a bell-crank 23, ful'crumed in a horizontally disposed subleversegment 24 held to the main frame, and

links'25 and l26 connecting the bell-crank with the heel of the type bar and the key lever,

TheV in@ is hagasshaaisajoumiiedn the end) plates ofthe platen Vcarriage 27 and carrying the usual linger wheels at its ends.

Carriage 27 f is supported on and travels over the carriagebed28, the base plate of the carriage and the carriage bed inclining rearward and downward in planes perpendicular to wall 13,v and said carriage and bed overlying the space4 between :frame walls 11 and 13. The carriage is supported on front ball bearings 1, confined between raceway members 2 and 3 securedv respectively to the carriage base plate andbed, andon a rear roller bearing 4 journalled onl a stub shaft 5l held to and projecting rearward and downward from a bar6 attached to the rear edgeof the carriage base plate by screws 7. Roller 4 is located about mid-length of the carriage and travels on abar 8 heldto the rear edge of the carriage bedby screws 9.

, A pair of guide members 29 depend fro-m` thecarriage bed, perpendicularto the plane of the bedpbetween a pair of guide members 31 attachedto the main frame side walls between walls 11 and 13 and extending parallel with wall 13 and guides'29, Guide members 29` are connected by a transverse brace rod 30 at their lower ends and form, with said rod andI .the carriagebed, a shift frame supporting the carriage to shift in a plane parallel with wall 13 and segment 14, ball bearings 32 being confined in raceways formed in members 29and 31vparallelY withy wall V13. rlfhe shift frame is shifted through theI medium of a torsion frame'comprising a rock shaft 36 (journalled Onpwalls 12 adjacent wall 11 and the base line of the main frame)- and rock arms 35 held to said shaft and having studs 34 connected with members 29. A shift key lever 133 (fiilcrumed on a horizontal pivot screw 38 held to a bracket`39) is connected at its rear end with one of said studs 34 to shift theshift frame.` The lower case'position of the shift frame is determined bythe engagement of stops 41 on the members 29 with stops 42 on brackets 43 attached to frame walls 12. Upper case position of the shift frame is determined by engagement of stops44 on the members 29v with stops 45 on brackets 43. Bracket 39 is one of'a pair of such brackets attached to walls 12 and supporting the type bar rest 4() at its ends,

The foregoing parts are all constructed and arranged as in said applications, above referred to, and as in the well known Corona Four typewriting machine. Theescapement for letter-spacing the carriage '27 and the mechanism for operating the escapement, are also constructed as disclosed in said applications. sheet metal bracket 46has its flat body part held by screws 47 against the bottom face of carriage bed23and extendingV across an opening` 48 in said bed. A steel bushing 49 extends through, and is tightly swaged in, an openingin said body part of the bracket and is formed with a narrow cylindrical hub portion 49 abutting the said bracket at its upper end, said hub portion being o-fkless vdiameter than the lower end of the bushing` Vto provide an annular seat` 49b parallel with said body part of the bracket for a line-lock member, hereinafter described, pivoted on said hub.

Bracket 46y is formed with pendent side arms 50 and 51 which extend downward and rearward and carrying at their rear ends the horizontal pivot screws 52 engaged in apertures in pendent pivot ears 54 and 55 formed.V at the ends of the flat body part of a sheet metal dog rocker A rigid holding dog 57, formed on the forward edge of rocker 56, anda feeding dog 5 8 (pivoted on the rocker at -59 and controlled by a suitable spring and stop device), cooperate with a toothed escapement wheel 60", to control the feed of the carriage. Tvllheel 60 is fixed on the lower end of a shaft 61 journalled in bushing 49 and carrying feed pinion 62 at its upper end meshing with a rack 63. Rack 63 lies between the carriage base plate and carriage bed and is formed integrally with the bar 6 attached to the carriage base plate. The carriage is` normally urgedtoward the left by the usual.springr drum 64, held to the .car-V riage bed yat 65, and the cable 66, wound on the drum and passing over pulley 67 (journalled in a slot 63 in the bed) and attached at. its free end to a screw 69 sec-uredto the car,-

riage base plate at the right hand end of the carriage. Pinion 62 is adapted tor pass through openingV 43m the bed 28, so that bracket 46 together with the parts .mounted thereon is removable from and attachable to thebed as a unitary afiemblage. y

-The dog rocker pivot ear' is formed with a forwardly extending stop arm 70 formed with an `upstanding rearwardly facing hook lug 70lnL the upper end of which normallyA abuts the bottom face of bracket 46 adjacent the inner Aside of bracket arm 51 to arrest return movement of dog rocker 56 under theV pull of the rocker return spring 71. Spring 71 is connected at its rear end with a. lug 72 projecting laterally outward from the lower end of rocker pivot ear 5a and is connected at its forward end with a pendent lug 73 on bracket arm 50. The feeding dog 58 normally engages a tooth of the escapeinent wheel with holding dog 57 above the plane of the wheel. he rocker is provided with an arm 74 depending from its pivot ear 55 and formed with an outwardly extending contact lug 75 at its lower end lying liatwise in a plane perpendicular to wall 13 and the path of movement of the shift frame. The rocker is adapted to be rocked through the medium of said arm 74 and lug 75 to disengage dog 58 and engage dog 57 with escapeinent wheel 60,by tappets 76 and 77 movable, respectively, with a type-bar-actuated universal bar 78 and a space bar 79 and vlocated forward of lug 75 Vwith their rear lug-contacting edges parallel with the path of shift of the shift frame.

rl'he arcuate universal bar 78 lies in a plane parallel with wall 13 and vibrates in a path substantially perpendicular to said wall within a recess 15 formed in the rear face of the type bar segment 14. Said universal bar is supported on the' forward ends of a pair of side arms 80 and 81 ,which extend rearward and downward therefrom, through openingsV shaft 36 on rock arms 841 and 85 held to aV rock shaft 86 journalled on horizontal pivot screws 87 in arms 88 extending rearward and downward from plate 2l forward of rod 30. The side bars or arms 80 and 81 are connected with the upper ends of rock arms 84' and 85, respectively, by horizontal pivots'89 which swing to opposite sides of a plane through pivots 87 parallel with wall 13. v

The tappet 76 is rigid with side arm 81of the universal bar and, in the machine shown, is normally spaced slightly forward of lug 75. Tappet 77 is rigid with a bar 90 and normally substantially engages lug 7 5,*A as shown.

, Bar 90 is pivotally'held at 91 to the lower end .Y of a rock arm 92 depending from a rock shaft 93 journalled in ears 94 on comb 22." Said rock shaft is provided with a pair of forwardly extending` rock arms 95 to which the space bar 79 is held. Bar 90 extends througha guide slot 96 in comb V22 landthen rearward under wall 13. Therear end of said bar lies alongside side arm V81 of the universal bar y and is provided with a downwardly inclined guide slot 97 in which engages a stud 98 projecting outward from rock arm 85.

In the normal operation of the machine the dog rocker isrocked from the position shown in Figs. 1 and 7 to the position shown in Fig. 2 by tappet 76 as a type bar 17 com# pletes its printing stroke, each of'said Vtype bars having a lug-17a which engages the universal bar 78 and pushes it rearward and downward carrying tappet 76 back until it engages against lug 75 and then pushes against said lug to rock the rocker forward on the dog rocker engages the inwardlybent rear end 101JL of one arm 101 of a bell-crank lever 101-1.02, pivoted on bracket side arm 51 on a horizontal pivot screw 103, to thereby prevent overthrow of the dog rocker. Lever arin 101 is provided with a rearwardly facing hook lug 101b alongside the rearwardly facing hook lug 70a on arm 70 of the dog rocker, said hook lug 101b being normally: held up. against the bottom face of bracket46 byV a springr 104; connecting lever 101-102 with enough to hold the rocker against overthrow.

Arm 102 of the bell-crank lever 101-+102 extends up through a slot 105 in the carriage bed 28 and'engages loosely behind the crossbar of a manually rockable escapement releasing bail 106. The side arms of bail 106 are located behind platen shaft 181 and are pivoted on horizontal screws 107 tapped into the end` platesV of carriage 27 and are formed with finger pieces 106a above their' pivots.

bracket arm 51, and said spring being strong,v y

By rocking said linger pieces forward against stopstuds 108 on the carriage end plates, the bell-crank lever may berocked to cause the inwardly bent jend 101a of arm 101 of the lever to engage and depress dog rocker arm 70 (over which said bent end extends) far enough to carry both escapement dogs down below the wheel 60 to free the carriage from control of the escapeinent. e,

Upon depression of the space bar the tappet'77 rocks the dog rocker in the same inann'er as tappet 76 t-o letter-space the carriage, overthrow-preventing stops for, thespace return springs 113 forfthe key levers andv areturn spring 114 f-or bar 90 and the space bar are also connected. vShaft 111 operates the ribbon mechanism of the machine and is .connected with the universal bar by an arm 115 (depending from universal bar side,

115 bar(not shown) beingprovided, constructed arm 80) and a link 116 connecting arm 115 with a second pendent rock arm 117 on shaft 111.

A margin stop bar 113, of square cross section and having notches 119 in its l'orward edge, provided with .trunnions 120 at its ends journalled in the end plates of the carriage. A sheet metal rock arm 121 (rigidly held to the right hand end ot bar 113) has its forwardly bent lower end 122 normally abutting the rear tace of bar 6 on the carriage, said rock arm having a lug 123 below its pivot connected by a return spring 124 for the margin stop bar with a part 125 held to the right hand end plate et the carriage at 123. The margin stop bar is adapted to be rocked by an upstanding release lever 127 rigidly held to the lett hand end ot said bar, and the throw of the stop barl by said lever is limited by a stop arm 128 extending forward Jfrom the lower end of said leverY and normally spaced above, and adapted to rock down into engagement with, th base plate of carriage 27.

AA combined carriage-retaining and stop,

l ping plate 129 formed oit sheet metal is adjustably held to the carriage bed 23 by screws 130 and 131 passing through the longitudinal slots 132 in a forwardly extending base flange formed on said plate and underlying the bed. Plate 129 extends up behind bars and 3 and is formed with a forwardly extending flange at its upper edge overhanging bar 6,

said flange having downwardly bent end lugs 133 and 134 in sliding ,engagement with the upper edge'ot' bar 6 to prevent accidental lifting of the carriage relatively to the bed. The forwardly bent. lowerv end 122 of rock arm 121 on the margin stop bar is adapted to abut the right hand edge oi plate 129 to determine the'maXimum travel of the carn riage toward the lett. A sheet metal stop member 135, held to the carriage base plate at 136, is provided with a stop lug 135a projecting rearward over bar 6 and adapted to engage the end oit lug 134 on plate 129 to determine the-maximum travel ot the earriage toward 'the right.

A pair of adjustable margin stops 137 and 133mounted on stop bar 113 are adapted to arrest travel ot the carriage toward the lei't and toward the right, respectively, at points intermediate the maximum limits oit the can riage travel. Each of these stops is provided with a pair of supporting ears slidable along bar 118. lResilient locking members 137n and 133EL held to stops 137 and 138, respectively,

` at 13'?d and 13Sd and urged to the rear by leaf springs 13?" and 1331, Yeach have locking ears 137c and133c through which bar 113 extends, the forward edge of ythe square opening in whichv isnormally engaged 4in one Voli the notches 119 in the margin stop Stop 137 is formed with a pendent stop lug 137e Vat its lower end adapted to engage and operate` aline-locking member, the lower edgeof said'lug being beveled orinclined down ward and toward the lett sideof the machine. 1

Stop A38 is formed at its right hand edge with a forwardly `projecting stop lug 1381e adapted to engage the straight rearwardly extending left hand side edge of a stop lug 139 punchedV up -from plate 1,29 and extending rearward from the upper part of said plate flatwise in a plane parallel with thev A'bracket 46 and held flat against the bottom 'face ol said bracket by the annular upwardly facing seat or shoulder 49b on bushing 49,

said plate having a slot-141 therein extending rearward from the forward edge ot said plate and rounded at its rear endso that the rear end and rear-'portions of theside walls of the slot hug the periphery of the hub section 49a ot the bushing. Slot 141 thus forms a. pivotal bearing aperture in the plate adapte ed to receive hub 49a and open at one'side so that the plate may beY slipped edgewise on and olil its pivot. n y

Plate 14() is formed with a rearwardly facing V-shaped notch 142, in its rear end, downwardly into which projects the thick head of the right hand Jfastening screw 130 for plate 129, said screw head being of less diameter than the width of the notch 142 at the point where said screw head extends into the notch. T he le'l't hand wall of notch 142 forms an abutment or stopface normally held engaged with the head oi screw 130 vent accidental detachment of the plate from its pivot hub.

Arm 144 1s ol'l'set upward intermediateits ends in rearof pl'ater129, said upwardly offset! part-oit said arm being formed with a-stop lug 146 project-ingrearward therefrom and lying tlatwise parallel with the carriage base plate and bed. Lug 146 has a straight rearwardly extending right hand edgefnormally in the path of travel of stop lug 137e of margin stop 13'?, and a beveled or inclinedY left hand edge extending rearward and toward the right. Plate 140 is formed -with a locking portion or latch arm 147 offset downward from and lying tlatwise in a plane parallel with the body part of said plate, said arm normally extending rearward and to the left from the left hand edge of plate 140 and clearing the rela-tively thin head yof fastening screw 131 of plate 129. Arm 147 is normally located in rear of the recesses of the rearwardly facing hook lugs a and 101b formed. on dog rocker arm 7 O and escapement releasing bell-crank lever arm 101, respectively, and is adapted to swing into'said recesses or hook throats when said plate 140 is rocked toward the left until arrested by engagement of the right hand edge of notch 142 with the head of screw 130.

It will be evident that, when the straight left hand edge of stop lug 137e lof margin stop 137 (set on bar 118 at the desired scale point) engages the straight right hand edge of lug 146 on locking member 140, it will swing member 140 toward the left against the pull of spring 143, as the carriage is Vfed toward the left, until such swinging movement of the locking member 140 is arrested by screw 130, thus causing the arm 147 to engage in the hook lugs 7 Oa and 101". It will be evident that when this occurs the dog rocker is positively locked in normal position so that the carriage cannot be fed farther toward the left. Since the dog rocker cannot tilt, itV will be obvious that, if a character key is depressed, its connected type bar 17 will simply swing upto the position shown in Fig. 3 where the universal bar 78 has moved slightly rearward and been arrested by tappet 7 6 striking lug 75 on the locked dog rocker. As the universal bar is thus arrested forward of its normal rearward limit of travel, it blocks the completion of the printing stroke of the type bar and thereby preventsmaking of superimposed impressions upon the work sheet. lt will be apparent, therefore, that the line-locking means locks the universal bar and the type actions against effective operation, and also locks the dog rocker against operation and prevents Operation of the escapement release devices. The locking or the escapement releasing bellcrank prevents an operator from exerting injurious strain. upon the locked dog rocker in the event the operator should attempt to free the carriage by operating release bail106.

It is frequently desirable to unlock the linelock in order that one or more letters may be written beyond the marginal line for which stop 137 is set to complete a word or syllable before returning the carriage to begin a new line of writing. rEllis may bedone by rocking the stop bar 118 by means of hand lever 127 on said bar, which lever is also operable to rock the bar to permit return of the car-' riage beyond the point for ywhich margin stop is set when it is desired to write in the left hand marginal space of the work sheet. it will be obvious that when the stop bar 118is rocked to carry stop lug 137e rearward beyond stop lug 146, spring A143 will restore the locking member-140 to unlocked position and stop lug 146 will be carried behind, and' to the right of the left hand edge of stop lug 137 e so that the mechanism will not become re-locked upon return of 4the stop bar 118 to normal position. l

ln order to provide more convenient and speedy means for rocking stop bar 118 for the purpose of unlocking the line-lock, a margin-release key 148 has been provided, located at the right hand side of the keyboard of the machine. Key 148 is supported on the upturned stem portion of the forward arm of a bell-crank release key lever 149. Key lever 149 is pivoted intermediate its ends on a horizontal pivot screw 150 eXtending transv-ersely of the machine and threaded in the right hand bracket 39 forward of wall 13. A link 151 extends rearward and downward from the upper end of the upturned rear arm of key lever 149 over the right hand end of wall 13 to a point under the carriage bed 28 where it is attached to the outerend Vof a linelock-rele'asing lever 152, the upperedge of wall 13 being cut away at 13a at its right hand end to afford clearance for link 151. Lever 152 is formed of she-et metal and is pivoted on a vscrew 153 which passes up through said lever intermedia-te its ends and is threaded into carriage bed 28. `The inwardly extending arm Cof lever 152 extends rearward to a point beyond the rear face of plat-e '129 where it is offset upward above arm 144 and is provided with 4a tappet 152aat its inner end overlying lug 146 von said arm'144 and normally of stop lug` 137 e of margin stop 137.

Release key lever 149 and releasing lever 152 are normally heldin the position shown in the drawings by a return spring 154 connected with the rear arm of the key lever at its upper end and connected at its lower end with the anchor bar 112, a stop lug 155 on the key stem of the key lever normally engaging under the key lever'stop cushion 156 held to comb 22.v Depression of the release key 148 and'throw of tappetl152a is limited by engagement of a stop lug 157, punched laterally from the key-stem, with comb 22, as shown in Fig. 4. It will be evident that, with the `parts-in locking position, as shown in'F ig. 9, depression of the release key 148 will cause tappet 152a to move rearward and press against the front face of stop lug 137e of margin stop 137 to swing said margin stop free of the locking member 140 which will snap into normal unlocked position with lug 146 behind lug 1370. Y

The beveled left hand. edge of lug 146 acts on stop 1110"137 to camrea'rward the margin stop 137,- wrsen the carriage is returned toward located forward of the path the right after completion of the line of writ ing, following an operation of the line-lock releasing means, so that said margin stop will not obstruct free return movement of the carriage. As the carriage continues its re- `advance of the carriage toward the left, lug

138ewill ride over the beveled right hand edge of lug 139 without stopping the carriage, stop 133 swinging rearward as it cams past stop lugv139. y

In order 'that the operator may be warned of the approach of the carriage to the point at which the line-lock will act, an alarm is provided operable by margin stop 137 shorti ly before said stop actuates the line-locking member. This alarm comprises a bell 158, a bell clapper 159, a spring wire supporting stem 1.60 for the cl'apper, and a supporting bracket 161 forthe clapper stem. Bracket 161 is provided with a. forwardly extending lug 162 at its right hand end engaged in a hole in the right hand guide member 29 of the shift frame, whichV lug together with a fastening screw 163 for bell 158 (passing through the stein of the bell and said bracket) threaded into member 29, holds the bracket to the rear face of member 29. The lower end of the spring stem 160 of the clapperis clamped to the left hand end of bracket 161 by a screw 16-1 threaded into 'the bracket. is formed with a rearwardly projecting lug 165 inthe path of stop lug 137e of margin stop 137, which stop lug is adapted to engage lug 165 and. flex stem 160 until said stop lug 137@ passes over lug 165,k whereupon the clapper will whip to the right against the bell before stop 137 actuates the line lock. The beveled. lower edge of lug 137e permits said lugto easily pass the lug on the bell clapper during return movement ofthe carriage.

It will be obvious that the margin stops are effective in both case positions of the platen; that the line-lock will lock the dog rocker in both case positions of the platen; that the Ylocked dog rocker will prevent an impression being made by the types irrespective of the case positionv of the shift frame; and thatthe universal bar, type action, and space barare rendered ineffective by means which shifts with the shift frame. 1t will also be observed that the line-locking means mounted on the shift frame is releasable by a key located in the keyboard of the machine. Link 151 isV adapted to swing about its point of-connection with'release key lever 149 during caseyClapper 159 y shifting operations, the link being so arranged that its rear moves betweeny two points located substantially equal distances above and below a plane perpendicular to wall 13 and the path of the shift frame and passing through the point of connection of the link with lever 149, so that the key lever 149 will rock releasing lever 152 equally in both case positions of the shift frame.

It is desirable to prevent movement of the line-locking member 111-0 to locking position in the event of the carriage being run toward the left tothe right hand marginal point determined by margin stop 137 with the escapement held released by the manually operable bail 106. The parts are so constructed and arranged, therefore, that upon actuation of the release bail to release the escapement, the line-locking' member 140 cannot be actuated by margin stop 137 into locking position until the dog rocker 56 and the bell-crank 101 1.02 have both returned to normal position following relieving of forward pressure by the operator upon the finger pieces 106 of the bail, as will be apparent from Figs. 11 and 12 ofthe drawings.

f In Fig. 11 the escapement is shown fully released by afull forward movement of the bail finger pieces 1062" with margin stop 137 press-` ing against the locking member-'1210 which has been shifted slightly around its pivot in locking direction but is held against movement into its locking postion by reason of engagement of its latch arm 147 with the nose or rear end of hook lug 101b on the bell-crank 101- 102. In Fig, 11 the release bail is shown partly returned to'normal position, and. it will be observed that the dog rocker has already i'eac'hecl`normal position with hook lug 7 0y on arm engaged under the bracket 416, the nose of hook lug 101b at this time still holding the arm 147 of locking memberlllO out of locking position and inan ineffective postion which has permitted the full return movement of the dog rocker with its arm 70 and hook lug 70a.

It will be evident that upon completion of return movementof the bail from the position shown in. Fig. 12, the parts will assume the locked position shown in Fig. 3, the line-locking member 140 completing its swinging movement under pressure from stop 137 to cause its latcharm 1117 to engage in the throats of bothhook lugs 70a and 101b as the pivoted feeding dog 5.8 is rocked to carriage-holding position by a tooth of the escapement wheel 60. Possible injury to or jamming of the machine by reason of the line-locking member prevent-ing; full return movement of the Y dog rocker is thus avoided, and locking of 1 the machine against printing is ensured when the marginal point is reached by movement of. the carriage to the marginal point by a jump or running movement with the escapement released. It will be apparent lfrom Figs. 1, 3 and 12 that the inwardly bent end 101L of bell-crank arm 101, Where iti throughout the movement otarm 70 and hook l from 'and to normal position during escapement releasing'and re-'engaging operations.

Vhat We claim is:

1. In a typewritingmachine, a traveling platen carriage, escapement mechanism for the carriage, manually operable escape-ment releasing means, and means operable automatically at a predetermined point in the travel of the carriage under the control oi its escapement mechanism for separately locking the escapement mechanism and the escapement releasing means against operation.

2. In a. typevvriting machine, a traveling platen carriage, escapement mechanism for the carriage, manually opera-ble escapement releasing means, means operable automatically at a predetermined point in the travel of the carriage under the control of its escapement mechanism for separately locking the escapement mechanism and the escapement releasing means against operation, and manually operable means for freeing the escapement mechanism and escapement releasing means from said locking means While the carriage remains stationary.

3. In a typeivriting machine, a traveling platen carriage, escapement mechanism for the Carriage, manually operable eseapementreleasing means normally ell'ective on the escapement mechanism when actuated to tree the carriage from control of the esca-pement mechanism, and line-locking latch operable from. the carriage and directly engageable with both the escapement mechanism and said escapement-releasing means to prevent operation thereof.

l. In a typevvriting machine, a traveling platen carriage, a margin stop mounted to travel with the carriage and adjustable longitudinally of the carriage, escapement mechanism for the carriage, manuallyY operable escapement-releasing means normally effective on the escapement mechanism when actuated to free thel carriage from control of the estapement mechanism, a spring retracted lineloc-king latch mounted independently of the carriage and operable in opposition to its retracting spring by said stop to directly engage with both the escapement mechanism and said escapement-releasing means to prevent operation thereof, and manually operable margin-release means for unlocking the line-locking latch.

In a typewriting machine, a traveling platen carriage, escapement'mechanism for' the carriage, hey-operated printing means,

releasing means for freeing the carriage from control oi' the -escapement mechanism, andline-lockingmeans operable from the carriage to prevent printing operations of said printing means at a predetermined letterspace position el the carriage, said line-locking means including apart co-operating directly with a part of said escapement releasing means when said locking means is actuated to prevent operation of said releasing means.

6. In a typewriting machine, a traveling platen carriage, escapement mechanism for the carriage, key-operated printing means,releasing means for freeing the carriage from control of the escapementmechanism, linelocking meansoperable from the carriage to prevent printing operations of said printing means at a predetermined letter-space position or" the carriage, .'aid line-locking means,l

including a part cooperating directly With a part of said escapement releasing means when said locking means is actuated to prevent operation of said releasing means, and vmeans for unlockng the line-locking means and freeing said releasing means from the restraint of said part.

7. In av typevvriting machine, a traveling platen carriage, escapement mechanism for the carriage including a vibratory part operable rom the character keys of the machine to effect letter-spacing of the carriage, escapement releasing mea-ns adapted to shift said vibratory part to a position in which the carrage is released from control of the escapement mechanism, and line-locking means operable to lock said releasingmeans against action on said vibratory part and to lock said vibratory part against vibration by the keys.

8. In a typeivriting machine, a traveling platen carriage, a margin stop held to travel with the carriage, escapement mechanism for the carriage including. a vibratory part operable from the character keys of the machine to elect letter-spacing of the carriage, es-

Vcapement releasing means adapted to shift said vibratory part to a position in Whch the ycarriage is released from control of the escapement mechanism, anda line-locking latch operable by the margin stop to a locking position lin which it directly engages both said vibratory partand said releasing means to lock said releasing means against action on said vibratory part and to lock said vibratory part against vibration by the keys.

9. In a. typewriting machine, a traveling platen carriage, escapement mechanism :for the carriage including a dog rocker pivotally supported independently of the carriage, character-ley-operated means for vibrating the rocker to feed the carriage, manually operable escapement releasing means adapted to rock the dog` rocker to a point in which the carriage is tree from the `locking position engaging With control of the escapement mechanism, and line-locking means operable from the carriage and mounted independently thereof, said locking means When actuated to locking position co-operating with? the dog rocker to hold the same against vibration by said character-key-operated means and also co-operatingwith said escapement releasing means to prevent action thereof upon the held dog rocker. v p

l0. In a typeWriting machine, a traveling platen carriage, escapement mechanism for thev carriage including a dog` rocker pivotally supported independently of the carriage, character-key-operated means for vibrating the rocker to feed the carriage, an escapement releasing member pivotally supported independently of the carriage and manually rockable at will to rock the dog rocker to a point in which the carriage is free from the control of the yescapement mechanism and a line locking latch operable from the carriage and mounted independently thereof, said latch whenactuated to the dog rocker tohold the same against vibration by said character-key-operated means and also engaging with said pivoted escapement releasing member toy preventrocking thereof.

11. In a typewriting machine, a traveling platen carriage, a universal bar, printing means actuating the universal bar, escapement mechanism for the ,carriage including a dog rocker operable from the universal bar, manually operable escapement releasing means for overthrowing said rocker in the direction of its movement by the universal bar to free the carriage from control of the escapement mechanism, and line-locking means operable from the carriage for locking said escapement releasing means against operation on the dog rocker and simultaneously locking the dog rocker to thereby block printing action of the printing means by restraining movement of the universal bar. i

12. In a typewriting machine, a traveling platen carriage, an escapement for the carriage including a dog rocker, a type-bar actuated universal bar, a tappet movable positively with the universal bar and arranged for engagement with the dog rocker to rock said rocker during the printing strokes of the type bars, key-operated type bars for actuating the universal bar during their printing strokes, manually operable escapement releasing means engageable with the dog rocker to overt-bron7 the rocker `in the direction of its movement by said tappet, and line-locking means operable from the carriage to hold the dog rocker against movement by the tappet and hold said escapement releasing means against action on the held dogv rocker.

13;A In a typevvriting,A machine,.a traveling platen carriage, an escapem'ent for the carriage including a dog rocker, a type-bar actuated universal bar, a tappet movable positively With the universal bar and arranged for engagement With the ldog rocker to rock said rocker during the printing strokes of the type bars, key-operated type bars for actuating the universal bar during their printing strokes7 manually operable escapement releasing means engageable With the dog rocker to overthrow the rocker in the direction of its movement by said tappet, line-locking means Operable from the carriage to held the dog rocker against movement by the tappet and hold d escapement releasing means against action on the held dog rocker, and manually operable means for releasing the line-locking means While the carriage remains stationary.

lll. In a typewriting machine, a traveling platen carriage, escapement mechanism for the carriage including a key-Operated dog rocker supported independently of the carriage, a lever supported independently of the carriage adapted toengage and rockthe rocker to a point at which the carriage is free from control ofthe escapement meehanism, manually operable means on the car- 1ia-ge for rocking said lever at any point in the travel of the carriage,l ar line-locking member shiftably supported independently of the carriage, means normally urging said locking member in one direction to an ineective position, and a margin stop traveling with the carriage and' adapted to engage and shift said locking member to an etfective positiOn in Which it is so engaged with both the rocker and said lever as to prevent rocking of the rocker by the keys and prevent rocking of the lever by said manually operable means on the carri-age.

15. In a typewriting machine, a traveling platen carriage, escapement mechanism for the carriage including a key-operated dog rocker supported independently of the carriage, a lever supported independently of the carriage adapted to engage and rock the rocker to a point at Which the carriage is free fromcontrol of the escapement mechanism, manually operable means on the carriage for rocking said lever at any point in the travel of the carriage, a line-rocking member shiftably supported independently of the carriage, means normally urging said locking member in one direction to an inelective position, a margin stop traveling With the carriage and adapted to engage and shift said locking member to an effective position inA which. it is so engaged With both the rocker and said lever as to prevent rocking of the rocker by the keys and prevent rocking of the lever by said manually operablevmeans on the carriage, and key-operated margin-releasem-eans mounted independently of the carriage and effective on said margin stop when said incl;-

ing member is in locking position to shift the stop "out ot' ei'iggafgement with the locking member. v

1b. In a typewriting machine, a 'carriage support, a carriage mounted to ltravel on said support, a margin stop mountedv'on the carriage to travel therewith, a swinging linelo'cking member having a bear'I ig opening therein open at one side to an' re ot said member, pivot means on the carriage support yeirtending" throiigh the bearing opening in said member and adapted to pass through the open side 'et the bearing` opening,- 'stop means on the carriage support lim. iig' swinging movement of said locking` member in opposite directions about said pivot means, vanda return springconnected with said member vand the 'carriage simp'ort for norn'iallT swinging' said member in one direction to an ineti'ective position and constantly urging 'said member in a direction to prevent lateral sep'- aration of the member from its pivot means, said member being` engageable and movable by the margin stop about its pivot in oppositi'on to said return spring' into machinelocking' position.

17. n a typewriting machine, arcarriage bed, a platen carriage travelingN on the bed, a bracket held to the bed, a bushing held to and extending through the bracket p`erpendicular to the plane oi the bed, a feed pinion shaft jonrnall'e'd in said bushing, a lieed pinion on the shaft, a rack on the carriage nieshing with the feed pinion, an escap'ement wheel on the shaft, a dog rocker pivoted on the bracket, dogs on said rocker cooperative with said wheel, said bushing having an an-V nular shoulder spaced below the bracket and an external 'cylindrical bearing portion between the bracket and said shoulder, a linelockin member having; an open bearing; slot in one endthrough which said'external bearing' portion ot the bushing.;Y extends, said slotted end ot the locking member being conlined between the bracket and said bushing shoulder, aspringconnecting` said locking member with the bracket to urge the member -endwise in a direction to maintain pivotal engagement between the locking member and said external bearing portion ot the bushing and to also urge the locking member about its pivot in one direction to iiie'liective position, stopping means tor limiting swinging movements ofthe locking member in both directions tordetermine locking and release p'esitions thereof, and a margin stop on the carriage for engaging and swinging the locking' member against kthe act-ion of its spring to locking' position.

18. in a typewriting machine, a carriage bed, a platen carriage traveling on the bed, a bracket held to the bed, a bushing` held to extending through the bracket perpend, iilar to the plane 'of the bed, a feed pinion shaft journalled in said bushing, a teed pinion onine shaft, a rack 'on the "carri-age meshing with 'the feed pinion', an 'escapem'ent 'wheel on the shaft, `a 'dog rock'er pivoted on the bracket., 'dogsen rocker cooperative with said wheel, said 'bushing having' an a'nf nu'lar shonlderspaced below the bracket and an enter-nal cylindrical bearing portion 'between the said bracket and shoulder, a linelockinf' member havin-g an 'open bearing s l'ot in one endthrough which said external lbeareing portion ot' lthe bushing i extends, said lslotted end the locking,` member being confined between the bracket and said bushing shoulder, a spring connecting said locking member with the bracket to urge the member endwisein a direction to maintain pivotal 4engag'emen't between the locking member and 'said bearing'portion of the bushing an'd to also urge the locking member about its pivot in 4one direction to ineffective position, 'stopping.;` means for limiting' swinging move-` ments ot the locking member in both directions to determine locking` and release .positions thereof, and a mar-gin jstop on the clarringe for engaging and swinging the locking member against the action of its sprung; to

locking' position, saidlocking member when in lockingposition having a portion'tliere'ot l so disposed as to cooperate with apaitof member with the bracket and normally holding 'the member in ineffective position, a traveling carriage on the support, and a margi'n stop on the carriage adapted toenigage and swing-3,' said line-locking member into a positionin which it obstructs rockingmovement of the dog rocker. i x 20. In a typewriting machine, al traveling platen carriage, a dog rocker pivotally sup-V ported independently of the carriage to rock np and down, an iipstanding hook-like lug on vthe dog rocker, a line-locking member pivotally supported independently ot the carriage to swing laterally, a margin stop on tli'ecarriage engageable with said member to swing the same in one direction-to engage a part (if said member in said hook-like lug, anda spring;` connected with said member normally holdingtlie inember outV of engagement with said lng;

2l. InA a typewriting machine, a platen cai'- riage, a margin stop on the carriage,1a rotary said shaft bearing, aspring connected with said locking member and normally holding the same in a release position from which it lis movable by the margin stop into a position for obstructing rocking of the dog rocker.

22. In a typewriting machine, a shift 1 frame, a traveling platen carriage on the shift frame, means for shifting the shift frame, es- 'capement mechanism shiftable With the shift frame, escapement releasing means shiftable With the shift frame, normally ineifective locking` means for the cscapement mechanism and escapement releasing means shiftable with the shift frame, a inarg i stop on thev carriage arranged to actuate said locking meins to locking position, printing mechanism on the main frame, and means on the main frame operable by the printing` mechanism te actiiate the escapement mechanism and adapted to be held by the escapement mechanism in position to prevent printiifigaction of the printing mechanism when said locking means isv actuated by the margin stop.

23.111 a typewriting machine, a shift frame, a traveling platen carriage en the shift frame, means for shifting the shift frame, escapementv mechanism shiftable with the shift frame, escapement releasing means shiftable With the shift frame, normally ieffective locking means for the escapement mechanism and escapement releasing means sliiftable with the shift frame, a margin stop on the carriage arranged to actuate said locking means to locking position, printing mechanism on the main frame, means on the main frame operable by the printing mechanism to 'actuate the escapement mechanism and adapt.

ed to be held by the escapement mechanism in position to prevent printing action of the printing mechanism when said locking means is actuated by the margin stop, a margin-release key-lever on the main frame, and means on the lshift frame operable by said key lever in all case positions of the shift frame to disengage the margin stop from said locking means.`

Y 2l; Line-locking means coiiiprisingin coinbination a roti y escapeinent, and a marginstop-operated latch for-said escapeinent supported and pivoted on a bearing member for the shaft of the. escapement wheel.

25, ln a type-\.'iiting machine, a toothed feed wheel, a feed pinion. a shaft to which said feed Wheel and pinion are held, a bearingv iember in ivhichsaid shaft is vionrnalled formed'ivith an external cylindrical hearing portion, a dog` rocher, dogs on saidrocler cooperating vvith the feed wheel, a margin-stopoperated latch for the dog rocker pivotally ,mounted 'on said external bearing 'portion of the bearing member kfor said shaft, and meansnormally 'urging said latch ont of latching relationivith the dogrocker.

Q6. In a typewriting machine, atraveling carriage, a rack Von the carriage, a. feed pinion stop on the c;

lyreeeae meshing with the rack, an escapement Wheel, a shaft to which said pinion and Wheel are held, a bearing member in Which said shaft is gournalled intermediate the Wheel and p1n` ion, a support to Which the bearing member is held, said bearing member havingl an annular shoulder facing said support and an external cylindrical bearing portion between said support and shoulder, a latch pivoted on said external bearing portion and abutting said shoulder and support around its pivotal axis, a dog rocker, dogs on said rec er co-v 28. ln a typevvriting` machine, a traveling carriage, an escapen'ient for the carriage including a dog rocher pivotally supported independently of the carriage and having a hook-like stop portion normally engaged with a relatively stationary pait'of the machine, means connected With the dog rocker for urging the same to normal position, a latch pivotally supported independently of the,

carriage to swing into and out of the throat of said hook-like part about an anis extending transversely of the pivotal axis of the rocher, means normally urging the latch out of engagement with said hook-like part, and a margin stop on the carriage engageable with said latch to swing the latch into engageu ment with said hook-like part.

29, ln aitypeiv iting machine, a traveling carriage, an cscapeinent for the carriage includine;v a dog rocker pivotally 'snpportial in.- depeiidently of the carriage and having a hook-like stop portion normally engaged ivitli a relatively stationary part of the machine, means connected with the deg rocker Yfor urging the same to nernjial position, a latch pivotally supported indepcndeiitlyv of the carriage to swing into and out oi3 the throat of said hool-lil e part about an aXi ending transversely of the pivotal axis of the rocher, means normally urging the latch out of en gagement with ,s l hook-litro part, a margin we engageable with said lle latch to swing the latch into engagement with Y said lioolnlillre part, key-operated type bars,l and a type-bar-actnated universal. bar adapted to rock the dog rocher from normal position dering printing strokes of the type bars and iii position to prevent printing action of the type bars through the medium of the. rocker when the latch is in latching position.

latch to urge it toward the right and normally l olding,` the latch out ot said hook, a margin op `bar `iournalled on the carriage, a lettand margin controlling stop adjustable along said bar, and held to the bar to rock therewith, a spring' connected with said bar to yieldably hold the bar in position for engagement of the margin stop with said latch to rock the latch toward the lett into said hook, a release key in the keyboard. and a swinging member' piuotally supported independently ot the carriage and rockable by said key to engage the stop and swing it in unison with the stop bar to'ivhich it is held to release the latch. 34C.' ln a typewritingA machine, a traveling platen carriage, an escapement for the Carriage including a dog` rocker pivotally supported independently oi' the carriage, said rocker having a hook formed thereon, a latch pivotally supported independently of the rocker and carriage to swing transversely of the path of movement of the rocker into and out of said hook, a spring connected With said latch to'urge it toward the right and normally holding` the latch out of said hook, a margin stop bar oui-nailed on the carriage,alette-hand margin controlling stop adjustable along` said bar and held to the bar to rock therewith, a spring connected with said bar to yieldably hold the bar in position for engagement of the margin stop with said latch to roch the latch toward the left into said hook, a release lrey in the keyboard, a swinging-member pivetally supported independently of the carriage and rockable by said key to engage the stop and swing it in unison With the stop bar to Which it is held to release the latch, a righthand margin controlling` stop adjustable along the stop bar and held to rock With the bar, a fixed stop supported independently ot the carriage and engageable by the right-hand margin controlling stop to limit the return movement oi the carriage, and a hand lever tixcd on the stop bar whereby the said oar may be rocked against resistance of its connected spring to permit return movement of carriage beyond the letter-space position for which the right-hand margin controlling stop is set. 4

3,5. In a typewriting machine the combination oi e'scapement-releasimgmechanism and line-locking mechanism, the line-locking mechanism, when rendered effective, having weones a part thereof held in position to block operation ot the escapement releasing` mechanism.

36. In a typewriting machine, the combination of esc-apement-releasing mechanism and line-locking mechanism, the escapement-releasing mechanism, When rendered eitective, having a part thereof held in position to block operation of the line-locking mechanism.

37. In a typewriting machine, the combination oi' a platen carriage, a dog,` rocker` 'for the carriage escapement, line-locking means operable automatically to hold the dog` rocker in normal position, and manually operable means for rocking the dog rocher from normal position to a carriage releasing position and for preventing a locking movement of the line-locking` means While said dog rocker is rocked out of normal position.

38. Line-locking means for typevvriting` machines comprising in combination, a rotary escapement including` a bearingmember 'for the shaft of the escapement Wheel, a marginstop-operated latch for locking,` the machine having an open-sided pivot bearing slot through which said bearing member extends, and a spring connected With said latch to normally swing the latch about said member to ineffective position and constantly restrain lateral separation el the latch from',y said member.

39. ln a typewriting machine, an escapement including,` a bearing sleeve for the escapement Wheel shaft, a bracket in the machine through which said sleeve extends and to which said sleeve is held, said sleeve having' an annular shoulder spacedfrom one tace of said bracket, a margin-stop-operated latch Jier locking` the machine having?,Y a portion confined between said shoulder and bracket face formed With a pivot-bearing aperture through which said sleeve extends Which is open at one side to permit lateral separation of the latch from the sleeve, and a springl connected with said latch to hold the same in pivotal engagement With said sleeve and normally swing' the latch about the sleeve to inetieetive position.

In testimony WhereoiE We hereunto signatures.

aix our ernaar ALLEN avatar.l erro Param/mun. nmvin L. Hannon. 

